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a My Retirement & New Leadership at AoPS

rrusczyk 1473

N 4 minutes ago by LivelyAntelope60

I write today to announce my retirement as CEO from Art of Problem Solving. When I founded AoPS 22 years ago, I never imagined that we would reach so many students and families, or that we would find so many channels through which we discover, inspire, and train the great problem solvers of the next generation. I am very proud of all we have accomplished and I’m thankful for the many supporters who provided inspiration and encouragement along the way. I'm particularly grateful to all of the wonderful members of the AoPS Community!

I’m delighted to introduce our new leaders - Ben Kornell and Andrew Sutherland. Ben has extensive experience in education and edtech prior to joining AoPS as my successor as CEO, including starting like I did as a classroom teacher. He has a deep understanding of the value of our work because he’s an AoPS parent! Meanwhile, Andrew and I have common roots as founders of education companies; he launched Quizlet at age 15! His journey from founder to MIT to technology and product leader as our Chief Product Officer traces a pathway many of our students will follow in the years to come.

Thank you again for your support for Art of Problem Solving and we look forward to working with millions more wonderful problem solvers in the years to come.

And special thanks to all of the amazing AoPS team members who have helped build AoPS. We’ve come a long way from here:IMAGE

1473 replies

rrusczyk

Mar 24, 2025

LivelyAntelope60

4 minutes ago

J

H

k a March Highlights and 2025 AoPS Online Class Information

jlacosta 0

Mar 2, 2025

March is the month for State MATHCOUNTS competitions! Kudos to everyone who participated in their local chapter competitions and best of luck to all going to State! Join us on March 11th for a Math Jam devoted to our favorite Chapter competition problems! Are you interested in training for MATHCOUNTS? Be sure to check out our AMC 8/MATHCOUNTS Basics and Advanced courses.

Are you ready to level up with Olympiad training? Registration is open with early bird pricing available for our WOOT programs: MathWOOT (Levels 1 and 2), CodeWOOT, PhysicsWOOT, and ChemWOOT. What is WOOT? WOOT stands for Worldwide Online Olympiad Training and is a 7-month high school math Olympiad preparation and testing program that brings together many of the best students from around the world to learn Olympiad problem solving skills. Classes begin in September!

Do you have plans this summer? There are so many options to fit your schedule and goals whether attending a summer camp or taking online classes, it can be a great break from the routine of the school year. Check out our summer courses at AoPS Online, or if you want a math or language arts class that doesn’t have homework, but is an enriching summer experience, our AoPS Virtual Campus summer camps may be just the ticket! We are expanding our locations for our AoPS Academies across the country with 15 locations so far and new campuses opening in Saratoga CA, Johns Creek GA, and the Upper West Side NY. Check out this page for summer camp information.

Be sure to mark your calendars for the following events:
[list][*]March 5th (Wednesday), 4:30pm PT/7:30pm ET, HCSSiM Math Jam 2025. Amber Verser, Assistant Director of the Hampshire College Summer Studies in Mathematics, will host an information session about HCSSiM, a summer program for high school students.
[*]March 6th (Thursday), 4:00pm PT/7:00pm ET, Free Webinar on Math Competitions from elementary through high school. Join us for an enlightening session that demystifies the world of math competitions and helps you make informed decisions about your contest journey.
[*]March 11th (Tuesday), 4:30pm PT/7:30pm ET, 2025 MATHCOUNTS Chapter Discussion MATH JAM. AoPS instructors will discuss some of their favorite problems from the MATHCOUNTS Chapter Competition. All are welcome!
[*]March 13th (Thursday), 4:00pm PT/7:00pm ET, Free Webinar about Summer Camps at the Virtual Campus. Transform your summer into an unforgettable learning adventure! From elementary through high school, we offer dynamic summer camps featuring topics in mathematics, language arts, and competition preparation - all designed to fit your schedule and ignite your passion for learning.[/list]
Our full course list for upcoming classes is below:
All classes run 7:30pm-8:45pm ET/4:30pm - 5:45pm PT unless otherwise noted.

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0 replies

jlacosta

Mar 2, 2025

0 replies

J

H

so what's an excircle?

Vfire 50

N an hour ago by daijobu

Source: 2019 AIME I #11

In $\triangle ABC$ , the sides have integers lengths and $AB=AC$ . Circle $\omega$ has its center at the incenter of $\triangle ABC$ . An excircle of $\triangle ABC$ is a circle in the exterior of $\triangle ABC$ that is tangent to one side of the triangle and tangent to the extensions of the other two sides. Suppose that the excircle tangent to $\overline{BC}$ is internally tangent to $\omega$ , and the other two excircles are both externally tangent to $\omega$ . Find the minimum possible value of the perimeter of $\triangle ABC$ .

50 replies

2 viewing

Vfire

Mar 14, 2019

daijobu

an hour ago

J

H

USACO Gold Cutoffs

SweetTangyOrange 17

N an hour ago by fake123

share USACO Gold to predict cutoff

$\begin{tabular}{c} Score \\ \hline 717 \end{tabular}$

17 replies

SweetTangyOrange

Yesterday at 2:02 PM

fake123

an hour ago

J

H

9 MOP Cutoff Via USAJMO

imagien_bad 19

N 2 hours ago by TiguhBabeHwo

Vote here

19 replies

imagien_bad

Monday at 10:43 PM

TiguhBabeHwo

2 hours ago

J

H

ARML math competetion

purpledonutdragon 8

N 2 hours ago by BoyAthena

Do you guys have any tips for ARML? What are some concepts that will be very helpful in ARML?

8 replies

purpledonutdragon

Yesterday at 12:39 PM

BoyAthena

2 hours ago

J

H

Differentiation Marathon!

LawofCosine 190

N 4 hours ago by rchokler

Hello, everybody!

This is a differentiation marathon. It is just like an ordinary marathon, where you can post problems and provide solutions to the problem posted by the previous user. You can only post differentiation problems (not including integration and differential equations) and please don't make it too hard!

Have fun!

(Sorry about the bad english)

190 replies

LawofCosine

Feb 1, 2025

rchokler

4 hours ago

J

H

An interesting question about series

Ayoubgg 2

N 6 hours ago by solyaris

Calculate $\sum_{n=1}^{+\infty} \frac{(-1)^n}{F_n F_{n+2}}$ where $(F_n)$ denotes the Fibonacci sequence.**

2 replies

Ayoubgg

Mar 23, 2025

solyaris

6 hours ago

J

H

Matrix problem

hef4875 2

N Today at 1:02 PM by Filipjack

The matrix $A = (a_{ij}) \in Mat_p(\mathbb{C})$ is defined by the conditions
$a_{12} = a_{23} = \dots = a_{(p-1)p} = 1$ and $a_{ij} = 0$ for a set of indices $(i,j)$ .
Prove that there do not exist nonzero matrices $B, C \in Mat_p(\mathbb{C})$ satisfying the equation
$(I_p + A)^n = B^n + C^n.$ $\forall$ $n$ is a postive integer.

2 replies

hef4875

Today at 9:49 AM

Filipjack

Today at 1:02 PM

J

H

Prove f(x) >= 0

shangyang 3

N Today at 12:36 PM by solyaris

Let $f$ be a function that is at least twice differentiable on an open interval containing $[0, 2\pi]$ . Given that
$f(0) = f(2\pi) = f'(0) = f'(2\pi) = 0$ and
$f(x) + f''(x) \geq 0, \quad \forall x \in [0,2\pi].$ Prove that $f(x) \geq 0$ for all $x \in [0,2\pi]$ .

3 replies

shangyang

Today at 5:47 AM

solyaris

Today at 12:36 PM

J

H

Gaussian integral

soruz 3

N Today at 8:25 AM by Mathzeus1024

Exist a method of calculation for $\int e^{-x^2}\,dx$ , with help of $e^{i \phi}=cos \phi + i sin \phi$ and Moivre's formula.

3 replies

soruz

Oct 20, 2013

Mathzeus1024

Today at 8:25 AM

J

H

Limit conundrum

MetaphysicalWukong 4

N Today at 7:42 AM by MetaphysicalWukong

Source: UNSW

Why is the last statement not true? And how do we know the selected option is true?

4 replies

MetaphysicalWukong

Yesterday at 8:00 AM

MetaphysicalWukong

Today at 7:42 AM

J

H

Finding supremum of a weird function

pokoknyaakuimut 4

N Today at 6:56 AM by MihaiT

Find $\text{sup}\{2^{2x}+2^{\frac{1}{2x}}:x\in\mathbb{R}, x<0\}$ . Easy to guess that the answer is $1$ , but I haven't found the reason yet. :(

4 replies

pokoknyaakuimut

Feb 14, 2025

MihaiT

Today at 6:56 AM

J

H

real analysis

ay19bme 3

N Yesterday at 8:46 PM by ay19bme

...........................

3 replies

ay19bme

Yesterday at 4:19 PM

ay19bme

Yesterday at 8:46 PM

J

H

Integration Bee Kaizo

Calcul8er 50

N Yesterday at 7:10 PM by Shikhar_

Hey integration fans. I decided to collate some of my favourite and most evil integrals I've written into one big integration bee problem set. I've been entering integration bees since 2017 and I've been really getting hands on with the writing side of things over the last couple of years. I hope you'll enjoy!

50 replies

Calcul8er

Mar 2, 2025

Shikhar_

Yesterday at 7:10 PM

J

H

Putnam 1950 B1

centslordm 2

N Yesterday at 6:19 PM by KAME06

In each of $n$ houses on a straight street are one or more boys. At what point should all the boys meet so that the sum of the distances that they walk is as small as possible?

2 replies

centslordm

May 25, 2022

KAME06

Yesterday at 6:19 PM

J